BIOS iMac 820-01237-A

Hemantgupta_10

Registered member
Jul 20, 2017
12
0
39
Ďuring OS updation system was shutdown after few minutes when i tried to powering on then system is on but no display . We have diagnose the BiOS file was corrupted . We have tried another BIOS then display come but that BIOS is FirmWare Locke
 

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  • 820-01237 og.BIN
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Hemantgupta_10

Registered member
Jul 20, 2017
12
0
39
We have used Above mention BIOS . Display is coming. After that We installed the Mac OS Catalina. Installation completed and then showing below attached error and machine not booting
 

Attachments

  • IMG_8852.jpg
    IMG_8852.jpg
    3.5 MB · Views: 1

ThienBui

CEO
Supporter
Dec 13, 2013
98,629
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6,767
VinaFix
vinafix.com
We have used Above mention BIOS . Display is coming. After that We installed the Mac OS Catalina. Installation completed and then showing below attached error and machine not booting
this is problem hardware and MAC OS

you can try test hardware like this
 

bhuwan

Active Member
VIP PRO
Sep 25, 2014
12
0
Please build this bios . Old dump attached
Old bios issue no display
Regards
 

Attachments

  • 820-01237 old dump no display.BIN
    16 MB · Views: 1